You know, an easier solution might just be to reduce the coins in the reward. One should not underestimate the power of people's psychological reaction to big numbers. The idea that some PPC holders have hundreds of thousands if not millions of coins is quite silly and psychologically people will over estimate the value or underestimate the value based on how many zeros there are and where the decimal point it. Terracoin seems interesting because early adopters will have a tough time accumulating millions of coins. The difficulty adjusts fast to compensate for huge miners that might jump on board, and the pay out is 20TRC per block, which is less then bitcoin.
Someone dumping 1000 coins makes a far less dramatic impression psychologically on the members of the market then dumping 100000000 coins does.
That's just silly.
Did you play Diablo3? There, items are traded for millions of gold and people are accustomed to it. In wow the situation is entire different with much smaller numbers. But the end result is the same.
We simply substitute the zeros in our heads and arrive at the same behaviour.
I might be out on a limb here but I suspect it seems silly to you BECAUSE you play Diablo3. I'm in the majority here when I say I don't play Diablo3, or even videogames for that matter. Most people don't actually substitute the zeros in their heads and the redenomination of currencies when there get to be too many zeros happens by central banks all the time. Infact Iran is up for one very soon:
http://www.alsumaria.tv/news/56866/iraq-to-cut-off-dinar-zeros-by-january-2013/enThe central question for all cryptocurrencies long term success is if we are building a money system people can use or a money system that only 'Diablo3' players can use. If America still can't get on the metric system, you're not going to get people to wrap their heads around .00150243601BTC.
That said, even for your fellow Diablo3 players who are doing the substitution probably are just rounding to the nearest quarter million more often then not. The technical increase in precision is lost in practice if people just don't want to bother with the numbers and round up for convenience.
If you need a real-world example, just look at real estate prices. People don't advertise to sell homes for 1235469 USD, do they? They sell them for 1.3 million.
All that precision might be necessary for calculating taxes and bank loans, etc... (or the financial 'diablo3' players) but if buyers and sellers didn't need to do that, a seller and buyer would settle for 1.3 million in cash and leave it at that.
It's our arrogance as numerically orientated, technologically literate, an logically reasoned people to assume everyone is as 'efficient' as we are. And that arrogance could be the difference between failure and success.